Finding the Fourth Proportional to 613,498.50, 846,408.78 and 355,234.50

Step by Step Solution

1. Step 1: Write the proportion equation
   613,498.50 : 846,408.78 = 355,234.50 : x
2. Step 2: Convert to fraction form
   613,498.50/846,408.78 = 355,234.50/x
3. Step 3: Cross multiply
   613,498.50x = 846,408.78 × 355,234.50
4. Step 4: Simplify right side
   613,498.50x = 300,673,599,758.91
5. Step 5: Solve for x
   x = 300,673,599,758.91/613,498.50
6. Step 6: Final answer
   x = 490,096.72